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Carl Worth c6d5af3351 Fix to handle chained #define directives. 
The fix is as simple as adding a loop to continue to lookup values
in the hash table until one of the following termination conditions:

	1. The token we look up has no definition

	2. We get back the original symbol we started with

This second termination condition prevents infinite iteration.
2010-05-11 12:30:09 -07:00
main Add hash table implementation from glsl2 project. 2010-05-10 13:36:26 -07:00
tests Add test for chained #define directives. 2010-05-11 12:29:22 -07:00
.gitignore Add a very simple test for the pre-processor. 2010-05-10 16:21:10 -07:00
glcpp-lex.l Implment #define 2010-05-10 16:16:06 -07:00
glcpp-parse.y Fix to handle chained #define directives. 2010-05-11 12:30:09 -07:00
glcpp.c Implment #define 2010-05-10 16:16:06 -07:00
glcpp.h Implment #define 2010-05-10 16:16:06 -07:00
hash_table.c Add hash table implementation from glsl2 project. 2010-05-10 13:36:26 -07:00
hash_table.h Add hash table implementation from glsl2 project. 2010-05-10 13:36:26 -07:00
Makefile Add a very simple test for the pre-processor. 2010-05-10 16:21:10 -07:00
README Add README file describing glcpp. 2010-05-11 12:20:15 -07:00

README 

glcpp -- GLSL "C" preprocessor

This is a simple preprocessor designed to provide the preprocessing
needs of the GLSL language. The requirements for this preprocessor are
specified in the GLSL 1.30 specification availble from:

http://www.opengl.org/registry/doc/GLSLangSpec.Full.1.30.08.pdf

This specification is not precise on some semantics, (for example,
#define and #if), defining these merely "as is standard for C++
preprocessors". To fill in these details, I've been using the C99
standard (for which I had a convenient copy) as available from:

http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1124.pdf